数学物理学报 ›› 2020, Vol. 40 ›› Issue (5): 1259-1268.

• 论文 • 上一篇    下一篇

N维外区域中带变系数非线性项的半线性波动方程解的爆破

黄守军(),王娟*()   

  1. 安徽师范大学数学与统计学院 安徽芜湖 241002
  • 收稿日期:2020-01-08 出版日期:2020-10-26 发布日期:2020-11-04
  • 通讯作者: 王娟 E-mail:sjhuang@ahnu.edu.cn;649644039@qq.com
  • 作者简介:黄守军, E-mail:sjhuang@ahnu.edu.cn
  • 基金资助:
    国家自然科学基金(11301006);国家自然科学基金(11871075);安徽省自然科学基金(1408085MA01)

Blow up of Solutions to Semilinear Wave Equations with Variable Coefficient for Nonlinearity in an N-Dimensional Exterior Domain

Shoujun Huang(),Juan Wang*()   

  1. School of Mathematics and Statistics, Anhui Normal University, Anhui Wuhu 241002
  • Received:2020-01-08 Online:2020-10-26 Published:2020-11-04
  • Contact: Juan Wang E-mail:sjhuang@ahnu.edu.cn;649644039@qq.com
  • Supported by:
    the NSFC(11301006);the NSFC(11871075);the NSF of Anhui Province(1408085MA01)

摘要:

该文考虑NN≥2)维外区域中一类具有变系数非线性项的半线性波动方程的外问题,主要研究解的爆破和生命估计.基于文献[19-20]的方法,利用N=2及N≥3时外区域满足Dirichlet边界条件的调和函数以及测试函数方法,求出上述外问题解的生命跨度.特别地,变系数对解的的生命跨度的影响也在文中详细讨论.

关键词: 半线性波动方程, 外区域, 爆破, 生命估计

Abstract:

In this paper, we are concerned with the N(N ≥ 2)-dimensional exterior problem for a class of semilinear wave equations with variable coefficient nonlinearity. We mainly consider the blow up and lifespan of the solutions. Base on [19-20], by utilizing the test function and the harmonic functions of N=2 and N ≥ 3 in the exterior domains with Dirichlet boundary condition, we are able to derive the upper bound of lifespan. In particular, the impact of the variable coefficient nonlinearity on the lifespan has been discussed in detail.

Key words: Semilinear wave equation, Exterior domain, Blow up, Life estimate

中图分类号: 

  • O175.2